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USMLE Pharm drills
Every drug from FA & GRR
143
Pharmacology
Professional
02/05/2012

Additional Pharmacology Flashcards

 


 

Cards

Term
Purine Synthesis inhibitors
Definition
Hydroxyurea, 6-MP, 5-FU, MTX, Trimethoprim (b)
Think the reduction of THYMINE (except hydroxyurea which decreases both)
Term
Hydroxyurea
Definition
inhibits ribonucleotide reductase

-purine metabolism
Term
6-MP
Definition
(6-mercaptopurine)
Inhibits DE NOVO purine synthesis
Term
5-FU
Definition
(5-fluorouracil)
Inhibits thymidylate synthase (dec dTMP)
Term
MTX
Definition
(methotrexate)
inhibits DHF reductase (dec dTMP)
Term
trimethoprim
Definition
Blocks BACTERIAL DHF reductase
Term
Allopurinol
Definition
Inhibitor of xanthine oxidase
Prevents:
1) xanthine
2) uric acid
Term
Treatment: Oral Uridine
Definition
"orotic aciduria"
-NO hyperammonemia
-megaloblastic anemia refractory to b12 & folate
(de novo purine synthesis deficiency)
Term
Colchicine
Definition
-acts on microtubules
-prevents macrophage ingestion of uric acid
Term
Action of Fluoroquinolones
Definition
Inhibit DNA gyrase (prokaryotic topoisomerase)
Term
Action of etoposide
Definition
inhibits O topoisomerase II
Term
Action of doxorubicin
Definition
inhibits macromolecule synthesis and affects topoisomerase I -Also inhibits Ubiquinone/CoQ10
Term
Action of Camptothecin
Definition
Topoisomerase I inhibitor
Term
Action of topotecon
Definition
Topoisomerase I inhibitor
Term
Action of irinotecan
Definition
Topoisomerase I inhibitor
Term
Action of alpha-amanitin
Definition
inhibits RNA polymerase II (death cap mushrooms)
Term
Action of Rifamycin
Definition
RNA pol inhibitor of INITIATION
Term
Action of Rifampin
Definition
RNA pol inhibitor of INITIATION
Term
Action of ActinomycinD (Dactinomycin)
Definition
prevents DNA template formation
Term
Action of Streptolydigin
Definition
Prevents RNA elongation
Term
Action of Tetracyclines
Definition
30s binding -prevents aminoacyl-tRNA
Term
Action of Aminoglycosides
Definition
prevent initiation complex formation -causes misreading of mRNA
Term
Action of Chloramphenicol
Definition
Inhibits 50s peptidyltransferase (elongation inhibitor)
Term
Action of macrolides
Definition
50S Blocks translocation
Term
Action of Clindamycin
Definition
50S Blocks translocation
Term
Action of Cyclohexamide
Definition
60S (inhibits elongation)
Term
Action of Diphtheria toxin
Definition
eEF-2 (inhibits elognation)
Term
Action of Ricin (Caster bean)
Definition
cleaves eukaryotic rRNA (inhibits elognation)
Term
Action of Puromycin
Definition
replaces tRNA (inhibits elognation)
Term
Action of pseudomonas toxin
Definition
EF-2 (inhibits elognation)
Term
Action of Shaga/Shaga-like toxins
Definition
28S in 60S (inhibits elognation)
Term
Function of Smooth Endoplasmic Reticulum
Definition
Sight of detoxification for drugs and poisons (also for steroid synthesis)
Term
Action of Mebendazole/thiabendazole
Definition
(antihelminth) -disables microtubules
Term
Action of Griseofulvin
Definition
(antifungal) -inhibits microtubules
Term
Action of Vincristine/Vinblastin
Definition
(anti-cancer) -blocks microtubules
Term
Action of Paclitaxel
Definition
(anti-breast cancer) -blocks microtubules
Term
Action of Ouabain
Definition
Blocks K+ channels on NaK pump
Term
Action of TEA
Definition
Blocks K+ channels
Term
Action of TTX
Definition
Blocks Na+ channels
Term
Action of Digoxin
Definition
(cardiac glycoside) Inhibits CARDIAC NaK ATPase (decreases Na/Ca exhanger gradient and results in increased intracellular Ca)
Term
Actions (3) of Vitamin C
Definition
-Hydroxylation of proline (and lysine) -Collagen synthesis -Ferric ion reduction for absorption in duodenum -necessary for dopamine B-hydroxylase (conversion of Dopamine -> NE)
Term
Function of N-acetylcysteine
Definition
Used to loosen mucous plugs in CF patients -Cleaves disulfide bonds within mucous glycoproteins)
Term
(2) Uses for Isotretinoin (Vitamin A)
Definition
***Teratogenic -Treatment for severe acne & measles
Term
Uses of Niacin (b3)
Definition
Used to lower triglyceride & LDL levels, increases HDL -Causes facial flushing -INH therapy can interfere with it (along with B6)
Term
Pyridoxine (B6): two causes of deficiency
Definition
1) Oral contraceptives 2) INH therapy
Term
Action of Vit K
Definition
Gamma-carboxylation of glutamic acid residues (II, VII, IX, X, C & S) -Made by BACTERIA ONLY
Term
Action of Fomepizole
Definition
Inhibits Alcohol dehydrogenase -Antidote for methanol/ethylene glycol poisoning
Term
Action of Disulfiram (antabuse)
Definition
Inhibits acetaldehyde dehydogenase(increases acetaldehyde -> bigger hangovers)
Term
Treatment of pyruvate dehydrogenase deficiency (congenital disease state)
Definition
High intake of ketogenic nutrients: -fats -More specifically, lysine & leucine (acquired in B1 def in alcoholics)
Term
Action of Demerol
Definition
opiate Also, blocks complex I of ETC
Term
Action of Amytal (barbiturate)
Definition
"Truth Serum" Also, blocks complex I of ETC
Term
Action of Barbiturates
Definition
Sedative-Hypnotic Also, blocks complex I of ETC
Term
Action of Rotenone
Definition
Insecticide that blocks complex I of ETC -Degraded by sunlight
Term
Action of Antimycin A
Definition
Blocks cytochrome C (thus, blocking both pathways of the ETC)
Term
Action of Oligomycin
Definition
Blocks Fo component of Complex V () and increases the proton gradient
Term
Action of 2,4-DNP
Definition
-Uncoupler -causes leakage of H+ from intermembranous space into mitochondrial matrix
Term
Aspirin overdose (regarding the ETC)
Definition
-Uncoupler -Fever CAUSED by overdose -causes leakage of H+ from intermembranous space into mitochondrial matrix
Term
Action of Atractyloside (low yield)
Definition
inhibits ADP/ATP exchange in the ETC
Term
physiology of CN overdose
Definition
Binds Fe3+ in Complex IV(a/a3) of ETC -treat with high dose methylene blue (increases metHgb [Fe3+]) OR -Amyl Nitrate (Hgb -> metHgb) & Thiosulfate (CN -> thiocyanate)
Term
physiology of CO overdose
Definition
binds to Fe2+ in hemoglobin (major) and in complex IV (a/a3) of ETC (minor). -Treat with 100% O2 -~200x higher affinity for Hgb vs. oxygen
Term
Action of Amyl Nitrate
Definition
-Used in CN overdose -Converts Hgb -> metHgb
Term
Action of Thiosulfate
Definition
used in CN overdose -converts CN into thiocyanate (less toxic)
Term
Action of Methylene Blue
Definition
-Also used in HIGH DOSE to converts Hgb -> metHgb (Ferrous to Ferric iron)
Term
Drug induced (4) hemolysis in G6PD
Definition
Fava beans, sulfonamides, primaquine, Anti-TB drugs (dapsone)
Term
Treatment for hyperammonemia
Definition
Benzoate or Phenylbutyrate -bind AAs
Term
Action of Carbidopa
Definition
Inhibits DOPA decarboxylase(no L-DOPA -> Dopamine)
Term
Treatment for Phenylketouria (PKU)
Definition
No phenylalanine & Increased tyrosine
Term
Treatment of Cystinuria
Definition
Acetalozamide (alkalinizes the urine)
Term
Action of Fibrates
Definition
lower TGs -little effect on LDL
Term
Action of Statins
Definition
HMG-CoA reductase inhibitor (competitive inhibition)(Glucagon can also inhibit)
Term
ACE inhibitor teratogenic effect
Definition
renal damage
Term
ETOH teratogenic effect
Definition
Leading cause of birth defects & MR; FAS
Term
Alkylating agents teratogenic effect
Definition
missing digits
Term
aminoglycoside teratogenic effect
Definition
CN VIII toxicity
Term
Cocaine teratogenic effect
Definition
placental abruption
Term
DES (diethylstilbestrol) teratogenic effect
Definition
Vaginal clear cell carcinoma (females only)
Term
Folate antagonists teratogenic effects in first few weeks
Definition
Neural tube defects
Term
Iodide teratogenic effect (high or low)
Definition
Congenital goiter of hypothyroidism
Term
Lithium's teratogenic effect
Definition
Ebstein's anomaly (atrialized right ventricle)
Term
Maternal DM teratogenic effect
Definition
caudal regression syndrome (anal atresia to sirenomelia)
Term
Smoking (CO, nicotine) teratogenic effect
Definition
preterm labor, ADHD, IUGR, placental problems (nos)
Term
tetracycline teratogenic effect
Definition
discolored teeth
Term
thalidomide teratogenic effect
Definition
Flipper limbs
Term
Valproate teratogenic effect
Definition
blocks intestinal folate absorption
Term
Warfarin teratogenic effect
Definition
abortion, fetal hemorrhage, bone deformities
Term
Indomethacin's use in infants
Definition
Closes PDA
Term
Use of prostaglandins in infants
Definition
maintains PDA
Term
Treatment of Mycoplasma (ex. mycoplasma pneumoniae)
Definition
Erythromycin -bacteriostatic -50S inhibitor (protein synthesis)
Term
Morexella treatment
Definition
b-lactam (penicillin, carbapenum, cephalosporins, and monobactum) + b-lactamase inhibitor (clavulonic acid, sulbactam, tazobactam)
Term
4 b-lactam groups
Definition
penicillin, carbapenum, cephalosporins, and monobactum
Term
three b-lactamase inhibitors
Definition
Clavulanic acid sulbactam tazobactam
Term
Kirby-Bauer test
Definition
qualitative antibiotic susceptibility test
Term
MIC for antibacterial growth
Definition
minimal concentration of a drug that prevents growth of bacteria
Term
MBC for antibacterial growth
Definition
Minimal killing dose for bacterial growth. Used in immunocompromised patients
Term
Staph Aureus tx
Definition
Vancomycin (bactericidal, gram + ONLY - cell wall inhibitor) OR quinupristin/dalfopristin
Term
Strep Viridans tx
Definition
Penicillin G (b-lactam) and aminoglycoside (bactericidal; inhibits formation of initiation complex)
Term
strep pyogenes tx
Definition
b-lactam (penicillin, carbapenum, cephalosporins, and monobactum)
Term
Group B strep (s. agalactiae)tx
Definition
ampicillin + cephalosporin/aminoglycoside
Term
Diphtheria tx
Definition
Erythromycin + antitoxin
Term
Tetanus (c. tetani) tx
Definition
antibiotics + antitoxin Ig (against FREE/UNBOUND toxin)
Term
Botulism tx (c. botulinum)
Definition
antitoxin trivalent
Term
C. perfringens tx
Definition
delay wound closure (O2 prevents growth)
hyperbaric therapy
antibiotics
debridement
Term
C. Diff tx
Definition
metronidazole
Or very late = vancomycin
Term
Anthrax tx
Definition
rapid treatment (w/in 48 hrs) needed
Ciprofloxacin (fluoroquinolone; bactericidal; DNA gyrase inhibitor) or doxycycline(tetracycline; bacteriostatic; 30S)
Term
Listeria monocytogenes tx
Definition
ampicillin (b-lactam; bactericidal)
IC: gentamicin (aminoglycoside; bactericidal; initiation inhibitor)
Term
Actinomyces/Nocardia tx
Definition
SMZ-TMP (sulfamethoxazole & trimethoprim)
(PABA antimetabolite blocks DHP synthetase & bacterial DHF reductase inhibitor)
Both bacteriostatic. Known to exacerbate G6PD
Term
Tx for leprosy (Hansen's disease)
Definition
oral dapsone (competitive antagonist of PABA - bacterial folate synthesis derivative)
Term
Drug for prophylactic prevention of MAC in AIDS patients (cd4<50)
Definition
Azithromycin (bacteriostatic; block translocation during protein synthesis; 23S of the 50S
Term
Tx for Neisseria infections
Definition
Cephalosporins (bactericidal; b-lactam)
Term
H. Influenza meningitis tx
Definition
Ceftriaxone (cephalosporins; bactericidal; b lactam
Term
Legionella pneumonia tx
Definition
Erythromycin (macrolide; bacteriostatic; inhibits protein synthesis by blocking translocation; binds 23S of 50S)
Term
pseudomonas tx
Definition
aminoglycosides (bactericidal; prevents initiation complex and misreading) plus extended spectrum penicillin (Ticarcillin, carbenicillin & pipieracillin are mostly for psuedomonas coverage; bactericidal b-lactam)
Term
pseudomonas tx
Definition
aminoglycosides (bactericidal; prevents initiation complex and misreading) plus extended spectrum penicillin (Ticarcillin, carbenicillin & pipieracillin are mostly for psuedomonas coverage; bactericidal b-lactam)
Term
Salmonella/Shigella dysentery tx
Definition
quinolones (-floxacins)(bactericidal; inhibits DNA gyrase/topo II
Term
Triple therapy for H. Pylori
Definition
1) metrodinazole (bactericidal; increased free radical metabolites)
2) bismuth (binds toxins and coats ulcers)
3) tetracyclin/amoxicillin (bacteriostatic; binds 30S preventing aminoacyl-tRNA)/(b-lactam; bactericidal)
Term
tx for E. Coli diarrhea
Definition
Antibiotics not recommended!
Term
Tx for Borrelia Burgdorferi (Lymes)
Definition
Doxycycline/ceftriaxone (tetracycline; bacteriostatic; 30S and aminoacyl-tRNA)/(Cephalosporin; bactericidal; b-lactam)
Term
Syphillis (treponema pallidum) tx
Definition
PCN G (bactericidal; b-lactam)
Term
tx for bacterial vaginosis (gardnerella vaginalis)
Definition
metronidazole (inhibits protein synthesis)
Term
Rickettsiae tx
Definition
doxycycline (tetracycline; bacteriostatic; 30S; aminoacyl-tRNA)
Term
Chlamydiae tx
Definition
Doxycycline (tetracycline; 30S aminoacyl-tRNA) or Azithromycin (macrolide; inhibits translocation -> protein synthesis; 23S of 50S)
Term
Mycoplasma pneumoniae tx
Definition
Tetracycline (30S aminoacyl-tRNA) or Erythromycin (macrolide; inhibits translocation -> protein synthesis; 23S of 50S)
Term
Localized mycoses infection tx
Definition
fluconazole or ketoconazole (-azole)(Inhibis fungal ergosterol sythesis by blocking cyt-p450 enzyme
Term
Systemic mycoses treatment
Definition
Amphotericin B (binds ergosterol and creates leaky pore)
Term
topical analogue to amphotericin B
Definition
nystatin (pokes holes in ergosterol membrane
Term
PCP or jiroveci tx
Definition
1)TMP-SMX (trimethaprim & sulfamethoxazole) (inhibits DHF & PABA antimetabolite; both bacteriostatic; synergistic)
2)pentamidine (multistep interference - oxidative phosphorylation and nucleotide incorporation)
3)dapsone (PABA antagonist)
Term
Sporothirix tx
Definition
Itraconazole (-azole; p450 inhibitor affects ergosterol sythesis) or potassium iodide
Term
Giardia tx
Definition
Metronidazole (-azole; p450 inhibitor affects ergosterol sythesis)
Term
Entamoeba histolytica
Definition
Metronidazole and iodoquinol (-azole; p450 inhibitor affects ergosterol sythesis) and (amebocide with unknown mechanism according to accessmedicine.com)
Term
Cryptosporidium tx
Definition
Filtering city water supplies; no treatment!
Term
Toxoplasma gondii tx
Definition
Sulfadiazine & pyrimethamine (bacteriostatic; PABA antimetabolite that inhibits DHP synthetase) & (parasitic DHF reductase inhibitor)
Term
Naegleria tx
Definition
amphotericin B in those that survive (pokes holes in ergosterol wall)
Term
Plasmodium Falciparum or Malariae tx
Definition
Chloroquine (prevents plasmodium heme polymerase
Resistant: use mefloquine (MOA unknown per FA)
Term
Plasmodium Vivax/ovale tx
Definition
Treat with chloroquine (blocks plasmodium heme polymerase) & primaquine (probably generates free radicals or interferes with ETC)
Term
Babesia tx
Definition
quinine & clindamycin
(tons of stuff to metabolism and DNA & bacteriostatic; no peptide formation at 50S)
Term
Trichomonas Vaginalis Tx
Definition
Metronidazole (-azole; p450 inhibitor affects ergosterol sythesis)
Term
Intestinal nematodes (roundworm) tx
Definition
mebendazole (inhibits glucose uptake and microtubule synthesis)
Term
tx of tissue nematode infection
Definition
diethylcarbamazine (unknown moa)
Term
Tx for black fly river blindness (onchocerca)
Definition
Ivermectin (No CNS penetration of intense GABA-mediated immobilization)
Term
Echinococcus(Cestode; tapeworm)tx
Definition
mebendazole (blocks microtubules and glucose uptake)
Term
Tx for all trematodes (flukes) and Cestodes (tapeworm - less echinococcus)
Definition
Praziquantel (increases todes membrane permeability to Calcium causing contraction)
Term
Tx for Taenia solium (pork)neurocysticerosis
Definition
mebendazole (inhibits glucose uptake and microtubules)
Term
Live, attenuated vaccines - 7*
Definition
Smallpox, Yellow fever, VZV, Sabin Polio, MMR, Rotovirus, Adenovirus*(NOT attenuated)
-Caution in giving any of these to IC patients.
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